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dwins/gist:465afdfd16e886bdcff3

Created September 18, 2015 14:12
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gistfile1.txt
scala> case class Tx[T](tag: T, value: Int)
defined class Tx
scala> Tx(1, 1)
res0: Tx[Int] = Tx(1,1)
scala> res0.copy(tag = "one")
res1: Tx[String] = Tx(one,1)
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